1351633 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種畫素單元、方法及包含此畫素單元之顯示裝 置，特別是關於一種可用以感測一物件觸碰之畫素單元、方去及 包含此畫素單元之顯示裝置。 【先前技術】 液晶螢幕是利用液晶而發展出的全彩顯示技術之顯示裝置，由 鲁於具有省電、低#射、不占空間、重量輕等優點，且在尺寸大小 方面擁有相當的彈性，因此在數位相機、個人數位助理❻咖⑽ digital assistant; PDA)及電視機等具顯示螢幕之電子產品上，都可 以看到液晶螢幕之應用。另—方面，為了增加這些使用液晶登幕 之電子產品操作上的便利性，目前市面上之液晶螢幕亦可依據實 際應用上之需求，在液晶螢幕上增加觸碰控制㈣A _加⑽功 能，藉以讀取使用者之輸人以進行電子產品之㈣…般說來， • 此種液晶螢幕係為觸控式液晶·螢幕。 ’ …交而。目刖市面上觸控式液晶螢幕有各種製作方式；以電 .控液晶絲為例，其製作方式大致可分為兩類，—是在液 ^多增加—層具有感測功能之薄膜，藉由此賴達到觸碰 物件之Γ能；另—類製作方式則是於液晶螢幕中直接製作感測一 螢幕2 =的電路1 1圖係為習知可感測-物件之觸碰的液晶 數條播二圖。液晶勞幕1包含晝素單元10、輸出電路12以及複 102、可^雷16。晝素單元10中包含固定電容100、液晶電容 k電谷1〇4、畫素開關咖以及讀出開關108。當畫素單 5 1351633 元Η)被-物件(例如觸控筆、人的手指等)觸碰時 進而蝴出電流1〇1，並藉由讀出開二： -101傳輪至輸出電路12。最後輸出電路12 101之變化’以判斷晝素單幻0是否被觸碰。 電机 在另-種習知可感測一物件之觸碰的液晶螢幕中 中，晝素之電路係與一輸出電路連接。晝素單元包含-^電Γ 一液晶電容、複數個開關、-資料線以及-輸出線1定電Γ盘 液曰曰電谷接收—共㈣，並連接至該等開關。該等_其令之1 =以控制資料線所傳輸之電壓是否可傳輸至固Μ容與液 =出=開關則用以控制液晶電容與固定電容是否透過輸出線與 ㊉-路連接。液晶電容係為一可變電容其電容值 晶介電常數與電容兩電極之間的間距來蚊。當晝素單= t 、電今之電谷值會增大，其儲存之電荷之多寡便會 士生SL化it而產生—輸出電流’此時輸出電路即可判斷輸出電 之·之化’來判斷畫素單元是否被觸碰、然而，由於上述連接結 構的〜響’貝料線所傳輸之電壓通常會隨著畫素單元所顯示之灰 ^值之不同而有不同的變化量，因此電壓並非為-固定值，進而 影響液晶雷衮雷π A . 何之受化量，導致輸出電路判斷此晝素是否被觸 碰之難度。 综上所述，習Φ A b 自力電谷式觸控液晶螢幕都需在原本之液晶螢幕中 增加額外的元件，1 田於須在晝素中加入感應元件以及讀取線，此1351633 IX. Description of the Invention: The present invention relates to a pixel unit, a method, and a display device including the pixel unit, and more particularly to a pixel unit that can be used to sense an object touch, The square goes to and includes the display device of the pixel unit. [Prior Art] The liquid crystal screen is a display device of full-color display technology developed by using liquid crystal. It has the advantages of power saving, low emission, no space occupation, light weight, etc., and has considerable flexibility in size. Therefore, the application of the LCD screen can be seen on electronic products such as digital cameras, personal digital assistants (PDAs), and televisions with display screens. On the other hand, in order to increase the convenience of operation of these electronic products using LCD screens, the LCD screen currently available on the market can also add touch control (4) A _ plus (10) function on the LCD screen according to the needs of practical applications. Read the user's input to make electronic products (4)... The LCD screen is a touch-sensitive LCD screen. ‘...交交. There are various ways of making touch-screen LCD screens on the market. Taking electric control liquid crystals as an example, the production methods can be roughly divided into two categories, which are films that have a sensing function in the liquid. Therefore, the ability to touch the object can be achieved; the other way is to directly create a circuit that senses a screen 2 in the liquid crystal screen. 1 1 is a conventionally sensible sensing - the number of liquid crystals touched by the object The two pictures of the broadcast. The liquid crystal screen 1 includes a halogen unit 10, an output circuit 12, and a reset 102. The halogen unit 10 includes a fixed capacitor 100, a liquid crystal capacitor k electric valley 1〇4, a pixel switch, and a readout switch 108. When the pixel is 5 1351633 yuan), it is pulled by the object (such as a stylus, a human finger, etc.) and then the current is 1〇1, and by reading the second: -101 to the output circuit 12 . Finally, the change of the output circuit 12 101 is made to determine whether the pixel single illusion 0 is touched. Motor In another LCD screen that is known to sense the touch of an object, the circuit of the element is connected to an output circuit. The halogen unit includes -^ electric Γ a liquid crystal capacitor, a plurality of switches, - a data line, and - an output line 1 fixed electric disk liquid 曰曰 electric valley receiving - a total (four), and connected to the switches. The _1 is 1 = whether the voltage transmitted by the control data line can be transmitted to the solid state and the liquid = output = switch is used to control whether the liquid crystal capacitor and the fixed capacitor are connected to the ten-way through the output line. The liquid crystal capacitor is a variable capacitor whose capacitance is between the dielectric constant and the distance between the two electrodes of the capacitor. When the alizarin single = t, the electricity valley of the electricity will increase, the amount of charge stored will be generated by the SL-IT - the output current 'the output circuit can judge the output of electricity" To determine whether the pixel unit is touched, however, since the voltage transmitted by the ringing of the above-mentioned connection structure usually varies with the gray value displayed by the pixel unit, The voltage is not a fixed value, which in turn affects the liquid crystal Thunderbolt π A. The amount of the change, which causes the output circuit to judge whether the element is touched or not. In summary, the Φ A b self-powered valley touch LCD screen needs to add additional components to the original LCD screen. 1 Tian must add the sensing component and the read line to the pixel.
舉將降低畫素的開口率，且習知晝素單元容易受到由資料線輸入 之電壓的影盥，、佳A a 硬而増加判斷此畫素是否被觸碰之困難。是故， 6 何在不大中田改變習知畫素單元之構造與電路的情況下，製作一 種減J成本並具有高感職之電容式觸控液晶螢幕 ，乃是此業界 • 需要努力達成的目標。 【發明内容】 本發明之—目的在於提供—種應用於—顯示裝置之畫素單元， '«員不裝置包含-資m該畫素單元包含—關電路及一感測 鲁電路。該開關電路電性連接至該資料線。該感測電路電性連接至 該開關電路’並因應—物件之觸碰產生—訊號，其中該訊號藉由 •該開關電路之導通由該資料線向外傳輸。 本發明之另一目的在於提供一種顯示裝置，其包含一資料線、 驅動電路及-如前段所述之晝素單元。該畫素單元用以接收該 驅動電路傳运之畫素資料’並藉其開關電路及感測電路以因應一 物件之觸碰產生一汛號，而該訊號則藉由該開關電路之導通由該 資料線向外傳輸。 鲁本發明之又一目的在於提供另一種顯示裝置，用以感測一物件 • 之觸碰，其包含複數條資料線、複數條掃描線及複數個畫素單元。 各》亥畫素單元包含一可變電容以及一開關電路，該可變電容電性 連接至該開關電路。該等畫素單元之可變電容因應該物件之觸碰 而產生複數個訊號，該等掃描線與該等畫素單元依序電性連接， 用以依序導通該等畫素單元之開關電路，該等訊號藉由該等畫素 單元之開關電路之依序導通由該等資料線被傳輸。 本發明之次一目的在於提供一種感測一物件之觸碰之方法，該 方法用於一晝素單元，該晝素單元包含第一開關電路、第二開關 7 1351633 電路以及彳變電容，該方法包含下列步驟：在第_時間週期中 吏“第開關電路導通，並經由一資料線藉該第一開關電路輸入 -參考電Μ;根據該參考電壓並因應該物件之觸碰產生一訊號： 以及在第二時間週期中使該第二開關電路導通，並經由一讀出線 路藉該第二開關電路傳輸該訊號。It will reduce the aperture ratio of the pixel, and the conventional pixel unit is susceptible to the voltage input from the data line. It is difficult to judge whether the pixel is touched or not. Therefore, 6 how to create a capacitive touch-screen LCD screen with high cost and a high performance in the case of the change of the structure and circuit of the conventional pixel unit is the goal that the industry needs to achieve. . SUMMARY OF THE INVENTION The present invention is directed to providing a pixel unit for use in a display device, which includes a pixel circuit and a sensing circuit. The switch circuit is electrically connected to the data line. The sensing circuit is electrically connected to the switching circuit 'and generates a signal according to the touch of the object, wherein the signal is transmitted from the data line by the conduction of the switching circuit. Another object of the present invention is to provide a display device including a data line, a driving circuit, and a halogen unit as described in the preceding paragraph. The pixel unit is configured to receive the pixel data transmitted by the driving circuit and use the switching circuit and the sensing circuit to generate an nickname according to the touch of an object, and the signal is turned on by the switching circuit The data line is transmitted outward. Still another object of the invention is to provide another display device for sensing a touch of an object, comprising a plurality of data lines, a plurality of scanning lines, and a plurality of pixel units. Each of the Hi-pixel elements includes a variable capacitor and a switching circuit electrically coupled to the switching circuit. The variable capacitance of the pixel unit generates a plurality of signals due to the touch of the object, and the scan lines are electrically connected to the pixel units in sequence to sequentially turn on the switching circuits of the pixel units. The signals are transmitted by the data lines by the switching circuits of the pixel units. A second object of the present invention is to provide a method for sensing a touch of an object, the method being used for a pixel unit including a first switch circuit, a second switch 7 1351633 circuit, and a 彳-capacitor, The method comprises the following steps: in the _th period, 第 "the first switch circuit is turned on, and the first switch circuit is input via a data line - the reference Μ; according to the reference voltage and a touch of the object generates a signal: And turning on the second switch circuit in a second time period, and transmitting the signal by the second switch circuit via a read line.
本發明之又一目的在於提供一種應用於一顯示裝置之畫素單 元’用以感測-物件之觸碰’該顯示裝置包含—資料線及一讀出 線路。該畫素單元包含第—開關電路、第二開關電路及-可變電 容nm㈣路電性連接至該m該第二開關電路電性 連接至該讀出線路。該可變電容電性連接至該第-μ電路以及 “第帛關電路。在第—時間週期中，該可變電容由該資料線藉 '亥第㈤關電路接收—參考電壓，且該可變電容根據該參考電壓 並因應4物件之觸碰以產生—訊號；在第二時間週期中，藉由該 讀出線路傳輸該訊號。 本發明之另_目的在於提供—種顯示裝置，此顯示裝置包含一 :貝料線，驅動電路、一讀出線路以及一如前段所述之可感測一 物件之觸碰的畫素單元1畫素單元用以接收該_電路傳送之 畫素資料’其包含第—開關電路、第二開關電路及—可變電容。 〆第開關電路電性連接至該資料線。該第二開關電路電性連接 至該讀出線。該可變電容電性連接至該第一關關電路以及該第二 開關電路。在第一時間週期中，該可變電容由該資料線藉該第一 開關電路接收-參考電壓’且該可變電容根據該參考電壓並因應 4物件之觸碰以產生—訊號，在第二時間週期中，該訊號藉該第 8 1351633 二開關電路由該讀出線路傳輸至該驅動電路。 . 本發明之畫素單元可將感測電路所產生之訊號，藉由開關電路 由資料線向外傳輸，以節省輸出電路所需之花費以及空間。另外.， 藉由資料線輸入一參考電壓至可變電容，可提高畫素單元之感泪 一物件觸碰之感測度，因此藉由本發明可解決習知具有感測一物 件觸碰功能之畫素單元需增加額外之輸出電路，及易受因資料線 輸入之電壓的影響，導致增加判斷此畫素是否被觸碰之困難的缺 點。 在參閱圖式及隨後描述之實施方式後，該技術領域具有通常-知 識者便可瞭解本發明之其他目的，以及本發明之技術手段及實-施 態樣。 . 【實施方式】 ， 本發明之第一實施例如第2圖所示，係為一具有觸控螢幕功能 (touch screen function)之顯示裝置。顯示裝置2包含複數條資料線 20、複數條掃描線2卜複數個晝素單元22、一資料線驅動電路23、 一感測訊號判斷電路24、一掃描線驅動電路25以及一共電源·線 26。每一掃描線21依序與每一畫素單元22電性連接，藉由掃-描 線驅動電路25之驅動依序導通晝素單元22。晝素單元22用以-接 收資料線驅動電路23所傳送之晝素資料，並根據這些畫素資料進 行一晝面之顯示。該等畫素單元22係並因應其本身之導通將其因 應一物件之觸碰所產生的訊號依序由資料線20傳輸出去。感測訊 號判斷電路24係電性連接至該等資料線20,並用以接收該等畫素 單元22因應物件之觸碰所產生之訊號。感測訊號判斷電路24可 1351633 為比較器或積分器，或者為比較器及積分器之組合，而其可由熟 悉此技術者藉由已知技術達成。 • 第3圖係繪示畫素單元之其中一種態樣。詳言之，每—畫素單 元22皆包含一開關電路（即電晶體22〇)及一感測電路（即可變電容 221)。電晶體220係電性連接至資料線20 ’可變電容221係電性 • 連接至電晶體220，並因應物件之觸碰產生一輸出電流，而所產生 之輸出電流則藉由電晶體220之導通由資料線20向外傳輸至感測 訊號判斷電路24。 電晶體220包含第一極（即源極或汲極)22〇〇及第二極（與第一極 2200相對應之汲極或源極）22〇1。電晶體220之第一極2200係與 資料線20電性連接，以傳輸因應物件觸碰所產生之輸出電流至資 料線20。電晶體220之第二極2201係與可變電容221電性連接’ 以接收可變電容221因應物件觸碰所產生之輸出電流。電晶體22〇 具有閘極2202，其與掃描線21電性連接，以控制電晶體22〇之導 通。具體來說，掃描線21係用以控制閘極22〇2，進而控制電晶體 • 220之導通狀態。當電晶體220為導通時，資料線驅動電路23所 • 傳送之畫素資料可透過電晶體220輸入至晝素單元22，而因應物 件觸碰產生之輸出電流亦可經由電晶體22〇輸出至資料線2〇，並 傳輸至感測訊號判斷電路24。在本實施例中，.電晶體220可為n 型電晶體或P型電晶體。 當物件觸碰到畫素單元22時，被觸碰之書素單元22之可變電 各221的電容量將被改變，藉此，可變電容22丨即可產生因應物 件觸碰之輸出電流。詳言之，可變電容221包含第一極及第二極 1351633 221卜可變電容221之第一極測電性連接至電晶體22〇,用以 傳輸因應物件觸碰所產生之輸出電流至電晶體22〇。可變電容功 • 之第一極2211則電性連接至共電源線26，共電源線26則為可變 電今221產生輸出電流之一參考值（即提供一電壓至可變電容 221)。 . 晝素單元22另包含液晶電容222及固定電容223，其運作方式 係為此技術領域具有通常知識者所熟知，故在此不加贅述。 φ 顯示裝置2之畫素單元22可替換為如第4圖所繪示之晝素單元 22之另-種態樣。第3圖與第4圖所繪示之畫素單元22的不同點 為：第3圖之畫素單元22之固定電容223係與掃描線21電性連 接’而第4圖之晝素單元22之固定電容223則係與共電源線％ 電性連接。第4圖之晝素單元22的作用及原理與第3圖之畫素單 元22相同’故在此不加贊述。 藉由上述配置，本發明之第一實施例可藉由畫素單元之感測電 路因應一物件觸碰產生一訊號（即輸出電流），並將此訊號由資料線 Φ 輸出至一感測訊號判斷電路，以判斷畫素單元是否被觸碰，進而 • 使本發明之顯示裝置具有觸控螢幕功能。 本發明之第二實施例如第5圖所示’係為另一具有觸碰螢幕功 能之顯示裝置5 ^顯示裝置5包含複數條資料線5〇、複數條掃描 線51、52、53、資料線驅動電路54、掃瞄線驅動電路55、複數個 讀出線路56、感測訊號判斷電路57以及複數個晝素單元58。掃 描線51、52、53依序與每一晝素單元58電性連接，藉由掃描線 驅動電路55之驅動依序導通晝素單元58。畫素單元58用以接收 11 1351633 資料線驅動電路54傳送之晝素:㈣，並根據 面之顯示。 一系貝枓進仃晝 如第6圖所示，係為晝素單元58之其中一種態樣其包含第 =:(即第一電晶體60)、第二開關電路(即第二電、 可^電谷62及固定電容63。第一電晶體6〇及第二電晶體 電性連接至不同掃瞄線；例如，第一電晶 刀別 nt_61 _ ^ '生連接至掃描線 ㈣楚♦ 運接至知描線52。由於第一電晶體60 -電晶體61電性連接至不同掃瞒線，因此第—電晶 2及第二電晶體61之導通時間亦不盡相同。在掃描線 ΓΓ第期中雷’曰Γ電晶體60將被導通，使可變電容62由資二 5〇藉第一電晶體60接收—參考電壓。 、衣可變電容62可根據參考電魅因應物件之觸碰以產生一輸 ':。之後在掃描線52之第二時間週期中’第二電晶體6 ^可變電容62產生之輪出電流即可藉第二電晶體61決定是否 Γ出線路％被傳輸該輸出電流之。具體來說，第—時間週期可 至1秒’此時即為掃描線51被導通。第二時間週期可為】至 —心此時即為n線52被導通。藉由不同的導通時間週期，第 —電晶體60及第二雷a锻^ ·兹，2 + <導通㈣將會不同。此即分別錯 二 1輸入，考電塵至可變電容62以及輸出電流藉由讀出線路％傳 ，的時間’藉由不同導通時間週期來分別傳輸參考電塵以及訊號 桑作，即可充分避免f知畫素單元容易受到由資料線輸入之電 的影響㈣加判斷晝素是否_碰之_^此，參考電磨可 為顯不裝置5所有訊號之最大電壓。 12 1351633 第電曰曰體60具有第一極（即源極或沒極)6〇〇及第二極(與第一 極_相對應之源極或沒極）6〇!。第一電晶體6〇之第—極_ '性連接至資料線5〇，用以接收參考。第-電晶體60之第-搞 • 電性連Μ可變電L用以將參考電塵傳輸至可變電容 ^第二電晶體61具有第—極（即源極或汲極)㈣及第二極(與第 極610相對應之源極或汲極)611。第二電晶體61之第—極_ 電性連接至可變電容62,用以接收可變電容^因應該物件之觸碰 籲所產生之輸出電流。第二電晶體61之第二極6ιι電性連接至讀出 線路56,前述之輸出電流則經由讀出線路56進行傳輸。 藉由上述配置’本發明之第二實施例由資料線輸入—參考 以增加觸晝素單％是㈣觸碰之準確度及靈敏度。 、，本發明之第二實施例如第7圖所示，係為一種感測一物件之觸 ^之方法，此方法用於如第二實施例所述之畫素單元％。該方法 S兒明如下。 首先執行步驟70,在第—時間週期令使第一開關電路導通。接 .下來執行步驟71，經由資料線藉第—開關電路輸人—參考電壓。 •再執行步驟72，根據參考電壓並因應物件之觸碰產生-訊號。之 .後，執行步驟73’在第二時間週期中使第二開關電路導通。最後， 執行步驟74’經由—讀出線路藉第二開關電路傳輸此訊號。 除了第7圖所描繪之步驟外，第三實施例亦能執行第二實施例 ^操作及功能。本發明所屬技術領域具有通常知識者當可瞭It is still another object of the present invention to provide a pixel unit for use in a display device for sensing a touch of an object. The display device includes a data line and a read line. The pixel unit includes a first switching circuit, a second switching circuit, and a variable capacitor nm (four) circuit electrically connected to the m. The second switching circuit is electrically connected to the readout line. The variable capacitor is electrically connected to the first-μ circuit and the “first circuit”. In the first time period, the variable capacitor is received by the data line by the “Hay (5) off circuit—the reference voltage, and the The variable capacitor generates a signal according to the reference voltage and corresponding to the touch of the object; in the second time period, the signal is transmitted by the read line. The other object of the present invention is to provide a display device, the display The device comprises a bead line, a driving circuit, a readout line and a pixel unit 1 pixel unit capable of sensing the touch of an object as described in the preceding paragraph for receiving the pixel data transmitted by the circuit. The first switch circuit is electrically connected to the data line, and the second switch circuit is electrically connected to the read line. The variable capacitor is electrically connected. Up to the first off circuit and the second switch circuit. In the first time period, the variable capacitor receives the reference voltage from the data line by the first switch circuit and the variable capacitor is based on the reference voltage In response to 4 objects Touching to generate a signal, in the second time period, the signal is transmitted from the read line to the driving circuit by the 8th 1351633 two-switch circuit. The pixel unit of the present invention can generate the signal generated by the sensing circuit. The switch circuit is transmitted from the data line to save the cost and space required for the output circuit. In addition, by inputting a reference voltage to the variable capacitor through the data line, the tearing of the pixel unit can be improved. The sensitivity is touched, so that the pixel unit having the function of sensing the touch of an object needs to be added with an additional output circuit, and is susceptible to the voltage input by the data line, thereby increasing the judgment of the pixel. Disadvantages of difficulty in being touched. After referring to the drawings and the embodiments described later, the technical field has the ordinary knowledge to understand other objects of the present invention, as well as the technical means and real-acting aspects of the present invention. [Embodiment] A first embodiment of the present invention, as shown in Fig. 2, is a display device having a touch screen function. 2 includes a plurality of data lines 20, a plurality of scanning lines 2, a plurality of pixel units 22, a data line driving circuit 23, a sensing signal determining circuit 24, a scanning line driving circuit 25, and a common power supply line 26. A scanning line 21 is electrically connected to each pixel unit 22 in sequence, and the pixel unit 22 is sequentially driven by the driving of the scan-line driving circuit 25. The pixel unit 22 is configured to receive the data line driving circuit 23. The data is displayed on the basis of the pixel data, and the pixels 22 are transmitted by the data line 20 in sequence according to the conduction of the element. The sensing signal judging circuit 24 is electrically connected to the data lines 20 and is configured to receive signals generated by the pixel units 22 in response to the touch of the object. The sensing signal judging circuit 24 can be 1351633 as a comparator or The integrator, or a combination of comparators and integrators, which can be achieved by those skilled in the art by known techniques. • Figure 3 shows one of the elements of the pixel unit. In detail, each pixel unit 22 includes a switching circuit (i.e., transistor 22) and a sensing circuit (i.e., variable capacitor 221). The transistor 220 is electrically connected to the data line 20'. The variable capacitor 221 is electrically connected to the transistor 220, and generates an output current according to the touch of the object, and the generated output current is generated by the transistor 220. The conduction is transmitted from the data line 20 to the sensing signal judging circuit 24. The transistor 220 includes a first pole (i.e., source or drain) 22A and a second pole (dip or source corresponding to the first pole 2200) 22〇1. The first pole 2200 of the transistor 220 is electrically connected to the data line 20 to transmit an output current generated by the object touch to the data line 20. The second pole 2201 of the transistor 220 is electrically connected to the variable capacitor 221 to receive the output current generated by the variable capacitor 221 in response to the object being touched. The transistor 22A has a gate 2202 electrically connected to the scan line 21 to control the conduction of the transistor 22. Specifically, the scan line 21 is used to control the gate 22〇2, thereby controlling the conduction state of the transistor 220. When the transistor 220 is turned on, the pixel data transmitted by the data line driving circuit 23 can be input to the pixel unit 22 through the transistor 220, and the output current generated by the object touch can also be output to the transistor 22 through the transistor 22 The data line is 2 〇 and transmitted to the sensing signal judging circuit 24. In this embodiment, the transistor 220 can be an n-type transistor or a P-type transistor. When the object touches the pixel unit 22, the capacitance of the variable power unit 221 of the touched pixel unit 22 will be changed, whereby the variable capacitor 22丨 can generate an output current corresponding to the object touch. . In detail, the variable capacitor 221 includes a first pole and a second pole 1351633 221. The first pole of the variable capacitor 221 is electrically connected to the transistor 22A for transmitting the output current generated by the object touch. The transistor 22 is. The variable capacitor function • the first pole 2211 is electrically connected to the common power line 26, and the common power line 26 is a reference value of the output current (ie, a voltage is supplied to the variable capacitor 221). The pixel unit 22 further includes a liquid crystal capacitor 222 and a fixed capacitor 223, which are well known to those skilled in the art and will not be described herein. The pixel unit 22 of the φ display device 2 can be replaced with another aspect of the halogen unit 22 as shown in Fig. 4. The difference between the pixel unit 22 shown in FIG. 3 and FIG. 4 is that the fixed capacitance 223 of the pixel unit 22 of FIG. 3 is electrically connected to the scanning line 21 and the pixel unit 22 of FIG. The fixed capacitor 223 is electrically connected to the common power line. The function and principle of the pixel unit 22 of Fig. 4 is the same as that of the pixel unit 22 of Fig. 3, and therefore no mention is made here. With the above configuration, the first embodiment of the present invention can generate a signal (ie, output current) by the sensing circuit of the pixel unit according to an object touch, and output the signal from the data line Φ to a sensing signal. The circuit is judged to determine whether the pixel unit is touched, and further, the display device of the present invention has a touch screen function. The second embodiment of the present invention, as shown in FIG. 5, is another display device having a touch screen function. The display device 5 includes a plurality of data lines 5, a plurality of scanning lines 51, 52, 53, and a data line. The drive circuit 54, the scan line drive circuit 55, the plurality of read lines 56, the sense signal decision circuit 57, and the plurality of pixel units 58. The scanning lines 51, 52, and 53 are electrically connected to each of the pixel units 58 in sequence, and the pixel unit 58 is sequentially turned on by the driving of the scanning line driving circuit 55. The pixel unit 58 is configured to receive the pixels transmitted by the 11 1351633 data line driving circuit 54: (4), and display according to the surface. As shown in FIG. 6, one of the elements is a phase of the halogen element 58 which includes the first:: (ie, the first transistor 60) and the second switching circuit (ie, the second circuit, ^ 电谷 62 and a fixed capacitor 63. The first transistor 6〇 and the second transistor are electrically connected to different scan lines; for example, the first crystal cutter nt_61 _ ^ ' raw connected to the scan line (four) Chu ♦ Connected to the known trace 52. Since the first transistor 60 - the transistor 61 is electrically connected to different scan lines, the on-times of the first transistor 2 and the second transistor 61 are also different. During the period, the thunder transistor 60 will be turned on, so that the variable capacitor 62 is received by the first transistor 60 from the second capacitor 60. The variable capacitor 62 can be touched according to the reference electric object. A second output of the 'second transistor 6 ^ variable capacitor 62 is generated by the second transistor 61 in the second time period of the scan line 52 to determine whether the line % is transmitted. The output current is. Specifically, the first time period can be up to 1 second. At this time, the scan line 51 is turned on. The second time period It can be that the n-line 52 is turned on at this time. With different on-time periods, the first transistor 60 and the second thunder a forged, 2 + < conduction (four) will be different. That is, the error is two to one input, the test dust is transferred to the variable capacitor 62, and the output current is transmitted by the readout line %, and the reference electric dust and the signal are separately transmitted by different on-time periods, which can be completely avoided. f Knowing the pixel unit is susceptible to the influence of the input of the data line (4) Adding the judgment whether the element is _ _ _ ^, the reference electric grinder can be the maximum voltage of all the signals of the device 5. 12 1351633 60 has a first pole (ie source or no pole) 6 〇〇 and a second pole (source or no pole corresponding to the first pole _) 6 〇!. The first transistor 6 〇 the first pole _ 'Sexually connected to the data line 5〇 for receiving the reference. The first-electrode 60 is electrically-connected. The electric variable L is used to transmit the reference dust to the variable capacitor. The second transistor 61 has a first pole (ie, a source or a drain) (four) and a second pole (a source or a drain corresponding to the pole 610) 611. The first pole of the second transistor 61 Electrically connected to the variable capacitor 62 for receiving the output current generated by the touch of the object due to the touch of the object. The second pole 6 of the second transistor 61 is electrically connected to the readout line 56, the foregoing The output current is transmitted via the readout line 56. With the above configuration, the second embodiment of the present invention is input from the data line-reference to increase the sensitivity and sensitivity of the (4) touch. The second embodiment, as shown in Fig. 7, is a method of sensing the touch of an object, and the method is used for the pixel unit % as described in the second embodiment. The method S is as follows. In step 70, the first switching circuit is turned on during the first time period. Then, step 71 is performed, and the first-switch circuit is used to input the reference voltage via the data line. • Perform step 72 again to generate a -signal based on the reference voltage and in response to the touch of the object. Thereafter, step 73' is performed to turn on the second switching circuit during the second time period. Finally, step 74' is performed to transmit the signal via the second switching circuit via the readout line. The third embodiment can perform the second embodiment operation and function in addition to the steps depicted in FIG. The person skilled in the art to which the present invention pertains is ok.
解’第7圖所示之實施例如衍A 竹基於第二實施例以執行此等操作及 功能，故不再贅述。 13 ⑶ 1633 由上述可知，本發明可透過一資料線直接輸出感測電路因應物 件之觸㈣產生之訊號至—感測訊號判斷電路，以解決習知晝素 ‘單元需增加額外輸出電路之缺點。此外，本發明亦可藉著經由資 •，輸人—參考電壓’增加判斷畫素單元是碌觸碰之準確度及 靈敏度’因此可解決習知畫素單元易受其它輸入之電壓的影響而 增加判斷畫素是否被觸碰之困難。 上述實施例僅用來例舉本發明之實施態樣，以及閣釋本發明之 籲技賴徵，並非用來限制本發明之料。任何熟悉此技術者可輕 易完叙改變或均等性之安排均屬於本發明所主張之範圍，本發 明之權利範圍應以申請專利範圍為準。 【圖式簡單說明】 第1圖係為習知可感測一物件之觸碰的液晶榮幕之示意圖； 第2圖係為本發明之第一實施例之示意圖； 第3圖係為第一實施例之畫素單元之電路圖； φ 第4圖係為第一實施例之另一畫素單元之電路圖；. • 第5圖係為本發明之第二實施例之電路圖； 第6圖係為第二實施例之晝素單元之電路圖；以及 第7圖係為本發明之第三實施例之流程圖。 【主要元件符號說明】 1，液晶螢幕 10:晝素單元 12:輸出電路 14M6:掃描線 100:固定電容 1〇1:輸出電流 14 1351633The embodiment shown in Fig. 7 is based on the second embodiment to perform such operations and functions, and therefore will not be described again. 13 (3) 1633 It can be seen from the above that the present invention can directly output a signal-to-sensing signal judging circuit generated by the sensing circuit in response to the touch (4) of the object through a data line, so as to solve the disadvantage that the conventional unit needs to add an additional output circuit. . In addition, the present invention can also solve the problem that the pixel element is susceptible to the voltage of other inputs by increasing the accuracy and sensitivity of the pixel unit by increasing the input voltage of the pixel. Increase the difficulty of determining whether a pixel is touched. The above-described embodiments are merely illustrative of the embodiments of the present invention, and are not intended to limit the invention. Any arrangement that is susceptible to such changes and equivalence is well within the scope of the invention, and the scope of the invention should be determined by the scope of the claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a liquid crystal glory of a touch that can be sensed by an object; FIG. 2 is a schematic view of a first embodiment of the present invention; Circuit diagram of a pixel unit of the embodiment; φ Fig. 4 is a circuit diagram of another pixel unit of the first embodiment; • Fig. 5 is a circuit diagram of a second embodiment of the present invention; The circuit diagram of the pixel unit of the second embodiment; and the seventh diagram is a flowchart of the third embodiment of the present invention. [Main component symbol description] 1, LCD screen 10: Alizarin unit 12: Output circuit 14M6: Scanning line 100: Fixed capacitor 1〇1: Output current 14 1351633
102 ·液晶電容 2 :顯示裝置 21 .掃描線 23 :資料線驅動電路 25 :掃描線驅動電路 220 :電晶體 2201 :電晶體之第二極 221 :可變電容 2211 :電容之第二極 223 :固定電容 5 :顯示裝置 51、52、53 :掃描線 55 :掃瞄線驅動電路 57 :感測訊號判斷電路 60 :第一電晶體 601 :第一電晶體之第二極 610 :第二電晶體之第一極 62 :可變電容 104 可變電容 20 ： 資料線 22 ： 晝素單元 24 ： 感測訊號判斷電路 26 ： 共電源線 2200 :電晶體之第一極 2202 :電晶體之閘極 2210 :電容之第一極 222 液晶電容 50 ： 資料線 54 ： 資料線驅動電路 56 ： 讀出線路 58 ： 晝素單元 600 :第一電晶體之第一 61 ： 第二電晶體 611 第二電晶體之第二 63 ： 固定電容 15102 · Liquid crystal capacitor 2 : Display device 21 . Scan line 23 : Data line drive circuit 25 : Scan line drive circuit 220 : Transistor 2201 : Second pole of transistor 221 : Variable capacitor 2211 : Second pole of capacitor 223 : Fixed capacitor 5: display device 51, 52, 53: scan line 55: scan line drive circuit 57: sense signal determination circuit 60: first transistor 601: second transistor 610 of the first transistor: second transistor The first pole 62: variable capacitor 104 variable capacitor 20: data line 22: halogen unit 24: sensing signal judging circuit 26: common power line 2200: first pole of the transistor 2202: gate 2210 of the transistor : first pole of capacitor 222 liquid crystal capacitor 50 : data line 54 : data line drive circuit 56 : readout line 58 : halogen unit 600 : first 61 of the first transistor : second transistor 611 second transistor Second 63 : Fixed Capacitor 15